Display Panel Power-Driving Circuit With Parallel PMIC Outputs
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Solution Overview
Problem
The need for dedicated power management IC units to meet specific requirements for different display units increases overall costs due to over-design, particularly when applied to display units with high capacitance or impedance.
Innovation Solution
A power-driving circuit utilizing a single-specification PMIC unit that can be applied across various display units, incorporating a timing controller IC, multiple PMIC units, and a circuit unit, allowing parallel connections to increase current flow and deliver sufficient power, thereby eliminating the need for dedicated PMIC units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dedicated power management IC unit is designed for each display unit type, then the power delivery requirements for high capacitance or impedance display units are met, but the overall cost increases due to over-design
Solution Approach 1:
The patent applies universality by designing a single PMIC unit that can serve multiple display unit types through configurable output ports. The PMIC unit includes multiple output ports that can be selectively connected to different display units, allowing one PMIC design to fulfill power delivery requirements across various display configurations without requiring dedicated PMIC units for each type.
Solution Approach 2:
The patent applies dynamics through configurable and switchable output ports in the PMIC unit. The output ports can be dynamically connected or disconnected based on the specific display unit requirements, allowing the PMIC to adapt its power delivery configuration in real-time. This dynamic connectivity enables a single PMIC unit to handle different capacitance and impedance requirements without physical redesign.
2Power
If multiple PMIC units are used to meet high power delivery requirements, then sufficient power is delivered to display units with excessive load, but the device complexity and cost increase
Solution Approach 1:
The patent applies segmentation by dividing the power output into multiple independent output ports within a single PMIC unit. Each output port can be independently configured and connected to different display units, allowing the PMIC to distribute power to multiple displays simultaneously. This segmentation enables high power delivery capability while maintaining a single PMIC unit architecture.
Solution Approach 2:
The patent applies merging by combining multiple output ports and power delivery paths into a single PMIC unit. Instead of using separate PMIC units for each display, the invention merges the functionality of multiple PMICs into one unit with multiple configurable output ports, achieving the same power delivery capability with reduced component quantity and lower complexity.
Data Source
AI summary
A power-driving circuit for a display panel includes a timing controller IC unit, a first power management IC (PMIC) unit, a second PMIC unit, and a circuit unit. The first PMIC unit and the second PMIC unit are electrically connected to the timing controller IC unit to receive timing control signals. The circuit unit is electrically connected to the first PMIC unit and the second PMIC unit, and the first output ports of the first PMIC unit and the second output ports of the second PMIC unit are electrically connected in parallel to the output ports of the circuit unit. This results in increased current flow in the power-driving circuit, thereby providing sufficient drive to the back-end display unit. Therefore, this invention avoids the cost of over-design and is applicable in various display unit products with a single-specification PMIC unit.